Scientia Agricultura Sinica ›› 2007, Vol. 40 ›› Issue (9): 2103-2108 .

• RESEARCH NOTES • Previous Articles     Next Articles

Mapping of QTLs associated with leaf senescence in soybean

Shiyou Cui   

  1. 作物遗传与种质创新国家重点实验室/国家大豆改良中心/南京农业大学
  • Received:2006-03-03 Revised:2006-06-28 Online:2007-09-10 Published:2007-09-10
  • Contact: Shiyou Cui

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Abstract: 【Objective】Leaf senescence is a character of plant development, Delayed leaf senescence or stay green character has received considerable attention because of its negative impact on photosynthesis and its role in nutrient redistribution within the plant. 【Method】RIL-1 and 2 populations were used identified QTLs associated with leaf senescence, and correlation between leaf senescence and yield traits were also conducted. 【Result】The primary results indicated that three QTLs for leaf senescence were detected and mapped on LG-C1, D1b+W and O, each QTL explained 5.8~13.7% of total variation. Leaf senescence significantly and positively correlated with biological yield, seed yield, plant height and days to maturity in both populations except lower correlation with days to maturity in RIL-2. However, different correlation between leaf senescence and harvest index were observed, negatively and significantly in RIL-1 and positively and significantly in RIL-2. 【Conclusion】These indicated that harvest index may be increased through the selection of delayed leaf senescence in soybean breeding, but breeding materials with high potential of yield couldn’t be obtained.

Key words: leaf senesence, quantitative trait loci, soybean

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